試題詳解

13. Which statement is always correct when applied to a charge distribution located in a finite region of space?
(A) Electric potential is always zero at infinity,
(B) Electric potential is always infinite at a boundary surface to a charge distribution,
(C) Electric potential is always zero at a boundary surface to a charge distribution,
(D) Electric potential is always zero at the origin,
(E) The location where electric potential is zero may be chosen arbitrarily.